Related Clues:
- Code of life
- It's shared by identical twins
- CSI concern
- 6-Across evidence
- It can prove kinship
- Father identifier
- Genentech's ticker symbol
- See 106-Across
- Watson's code letters
- High-tech "fingerprint"
- Stuff of life
- Double-helix material
- Fingerprint with a twist?
- It could prove paternity
- Crime lab letters